/*
 * Copyright (c) 2011 Imre Fazekas.
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the Brillien nor the names of its
 * terms and concepts may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.vii.brillien.services.websocket.applications;

import com.vii.brillien.core.management.BrillienServices;
import com.vii.brillien.kernel.BrillienException;
import com.vii.brillien.services.jsonrpc.BrillienJsonRpcListener;
import com.vii.brillien.services.websocket.BrillienMediatorWebSocketApplication;
import com.vii.streamline.json.JsonRpcError;
import com.vii.streamline.json.JsonRpcListener;
import com.vii.streamline.json.JsonRpcServices;
import com.vii.streamline.services.error.StreamLineException;
import com.vii.streamline.services.json.JsonServices;
import org.glassfish.grizzly.websockets.WebSocket;

public class JsonRpcWebSocketApplication extends BrillienMediatorWebSocketApplication {

    protected static JsonRpcWebSocketApplication    webSocketApplicationInstance;

    protected boolean                               ssoRequired;
    protected JsonRpcListener                       listener;

    static {
        init();
    }

    private static void init(){
        if( webSocketApplicationInstance == null )
            webSocketApplicationInstance = new JsonRpcWebSocketApplication();
    }

    public static JsonRpcWebSocketApplication getWebSocketApplicationInstance() {
        init();

        return webSocketApplicationInstance;
    }

    @Override
    public void initWebSocketApplication() throws BrillienException{
        super.initWebSocketApplication();
        ssoRequired = BrillienServices.liaison != null && BrillienServices.liaison.getSSOPresenceName() != null;
        if( listener == null ){
            listener = new BrillienJsonRpcListener( ssoRequired, logger, mediator );
        }
    }

    protected void sendErrorMessage( WebSocket socket, JsonRpcError error){
        if( socket.isConnected() )
            try {
                socket.send( JsonServices.toJSON( error.wrapResponse() ) );
            } catch (StreamLineException e) {
                e.printStackTrace();
            }
    }

    @Override
    public void onMessage(WebSocket socket, String text) {
        Object response = listener.process( text );

        if( response != null )
            try {
                String reponseMessage = JsonServices.toJSON(response);
                if( socket.isConnected() )
                    socket.send( reponseMessage );
            } catch (StreamLineException e) {
                e.printStackTrace();
                if( socket.isConnected() )
                    sendErrorMessage( socket, JsonRpcServices.ERROR_SERVER_ERROR );
            }
    }

}
